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A piezoelectric device drive circuit

A piezoelectric device and drive circuit technology, applied in electrical components, power oscillators, etc., can solve the problems of high power consumption, high cost, large size, etc., and achieve the effects of low power consumption, small size, and simple circuit structure

Active Publication Date: 2017-09-08
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a piezoelectric device drive circuit, which aims to solve the problems of large volume, large power consumption and high cost in the prior art

Method used

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  • A piezoelectric device drive circuit
  • A piezoelectric device drive circuit
  • A piezoelectric device drive circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 2 An example circuit structure of the piezoelectric device driving circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the present invention are shown, and the details are as follows:

[0028] The piezoelectric device charge and discharge control module 101 includes a first switch S1 and a second switch S2, the electric energy charge and discharge control module 102 is a third switch S3, and the capacitor module 103 is a first capacitor C1;

[0029] The first terminal of the first switch S1 is connected to the positive pole of the DC power supply 200, the second terminal of the first switch S1 and the first terminal of the second switch S2 are jointly connected to the first terminal of the piezoelectric device 300, and the second terminal of the second switch S2 The two terminals are connected to the negative pole of the DC power supply 200 and the second terminal of the piezoe...

Embodiment 2

[0040] image 3 An example circuit structure of the piezoelectric device driving circuit provided by the second embodiment of the present invention is shown. For the convenience of description, only the parts related to the present invention are shown, and the details are as follows:

[0041] The piezoelectric device charge and discharge control module 101 includes a fourth switch S4, a fifth switch S5, a sixth switch S6, and a seventh switch S7, and the electric energy charge and discharge control module 102 includes an eighth switch S8, a ninth switch S9, and a tenth switch S10. and the eleventh switch S11, the capacitor module 103 is the second capacitor C2.

[0042] The first terminal of the fourth switch S4 and the first terminal of the fifth switch S5 are commonly connected to the positive pole of the DC power supply 200, and the second terminal of the fourth switch S4 and the first terminal of the sixth switch S6 are commonly connected to the piezoelectric device 300 T...

Embodiment 3

[0057] Figure 4 An example circuit structure of the piezoelectric device driving circuit provided by the third embodiment of the present invention is shown. For the convenience of description, only the parts related to the present invention are shown, and the details are as follows:

[0058] The piezoelectric device charging and discharging control module 101 includes a twelfth switch S12 and a thirteenth switch S13, the electric energy charging and discharging control module 102 includes a fourteenth switch S14 and a fifteenth switch S15, and the capacitor module 103 includes a third capacitor C3, a Four capacitors C4, a sixteenth switch S16 and a seventeenth switch S17.

[0059] The first end of the twelfth switch S12 is connected to the positive pole of the DC power supply 200, the second end of the twelfth switch S12 and the first end of the thirteenth switch S13 are jointly connected to the first end of the piezoelectric device 300, and the thirteenth switch S12 is conne...

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Abstract

The invention is applicable to the field of piezoelectric device driving and provides a piezoelectric device driving circuit. In the present invention, the on-off control of the piezoelectric device charging and discharging control module and the electric energy charging and discharging control module is combined to realize the charging of the piezoelectric device by the DC power supply, the discharging of the piezoelectric device to the capacitor module, and the charging of the piezoelectric device by the capacitor module. The device is charged or the piezoelectric device is discharged to the ground to achieve the purpose of driving the piezoelectric device or recovering the charge released by the piezoelectric device. The power consumption of the entire piezoelectric device driving circuit is small, the circuit structure is simple and small, and the circuit cost, thereby solving the problems of large volume, large power consumption and high cost in the prior art.

Description

technical field [0001] The invention belongs to the field of driving piezoelectric devices, in particular to a driving circuit for piezoelectric devices. Background technique [0002] In existing linear drive circuits or digital switch drive circuits, piezoelectric devices (such as piezoelectric ceramic buzzers and piezoelectric ceramic ultrasonic transducers) are directly driven from output pins of power amplifiers or digital circuits. Due to the large capacitance of the piezoelectric device, it can basically be equivalent to a pure capacitive load. If the driving voltage is U, the capacitance is C and the driving frequency is f, then the driving circuit will have a negative impact on the piezoelectric device under the best working conditions. The theoretical power consumed for driving is U 2 Cf; but in reality, the switching device and its distributed resistance in the driving circuit will cause 50% power loss, so the power obtained by the piezoelectric device is only 0.5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/32
Inventor 黄臻
Owner NATIONZ TECH INC
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